Wobbler mechanism



April 27, 1965 M. s. H. GIRODIN WOBBLER MECHANISM 2 Sheets-Sheet l Filed A ril 4, 1963 INVENTOR W o O m a u." G s .W R A M A ril 27, 1965 M. e. H. GIRODIN 3,130,159

WOBBLER MECHANISM Filed April 4, 1963 2 Sheets-Sheet 2 MARius a. H. einouiu 3380,15? Patented Apr. 27, 1965 United States Patent Office inside this transformer. The race 15 accommodates a 3,130,159 circular part 16 forming the spherical retaining race on WUBBLER MECHANISiM Marius Georges Henri Girodin, 1820 Place de la Madeleine, Paris 8, France Filed Apr. 4, 1963, Ser. No. 270,692 5 movement transformer 11, is fixed just outside the bearing Chims priority, application France, Aim 12 1962, races and spherical retainer 15, 16 and inside the torus 394,225, page 1,332,574 12. The teeth of ring 17 cooperate with a truncated part 3 Cl i ((33, 74 59) 18 carrying a ring of teeth 19, the truncated part 13 being fixed, by its small base, on the foot of the spindle 2.

The invention relates to a Wobbler mechanism for bar- The appliance works in the following manner: rel engines formed by a swivel joint fixed within the cas- When the shaft 8 is rotatively driven, its movement ing, an oblique pin single crank pin crankshaft traversdrives the pin 9 whose axis describesa cone having its ing the swivel joint and a movement transformer moved summit in the centre of the sphere 3. Thus, the movewith a luffing movement by the crank pin to move the merit transformer 11 integral with the pin 9 by means of connecting rod heads in the barrel engine cylinder. 15 the bearing 14 can revolve by means of the teeth 17 along According to the invention, the device is formed by a the teeth 19, which causes a reciprocating movement of central hollow fixed sphere held by a spindle integral with the heads of the connecting-rods housed in the cavities 13 a supporting part, a spherical race, mounted on the aforeof the torus 12. said hollow sphere, supports the movement transformait may be advantageous in certain machines to limit tion part which carries, at its outer or rear part, a hollow 20 the length of the spindle 2 so that it simply holds the torus having cavities cooperating with the connecting swivel-joint 3 and to mount the bearing 4 directly in this rod heads and a toothed crown cooperating with a second swivel-joint. toothed crown carried by the spindle. The crankshaft In FIGURE 2, the oblique pin b on shaft 8 is identical passing through the spindle comprises a pin whose longi- With that shown in FIG. 1. This also applies to race 5 tudinal axis passes through the center of the hollow sphere 5 held by the Wedge 6, but the parts '7 and 10 of FIG. 1 are and rests in a bearing assembled in the front part of the replac by a spherical part 20 revolving directly in the movement transformation part. female spherical elements inside the race 5.

Various other characteristics of the invention will FIGURE 3 shows, in a cylindrical cavity 13, a swivelmoreover be revealed by the detailed description which loiilt bearing 22 @Xfended y a St m 23- T e braked nut 24 follow 1 39 locks the swivel-joint race 22 in the end of the cavity 13.

Forms of embodiment of the purpose of the invention We shall see that the stem 23 is off-centered in relation are shown, by Way of example, in the attached drawings. to the cavity 13 so as to prevent any rotation of the swivel- FIGURE 1 is an axial section of a mechanism with a lbint face spherical bearing race extended. The swivel-joint of the connecting rod head 26 can FIGURE 2 is an alternative of the crankshaft provided thus luif between the swivel-joint race 22 and the holding with its double abutment bearing. 7 part 21 which is fixed on the swivel-joint race by a double FIGURE 3 is an elevation-section on a larger scale of a collared -P Ting Tbe Swivel-joint race-holding connecting-rod head. 7 part and ring assembly is centered in the cavity 13.

FIGURE 4 is a e tion showing another fo of The oil reaching the pole of the swivel-joint race 22 bodiment of the device comprising an extended torus, the gh the ducts and 2211 Com s to the pole of the mounting of a retaining gearing and the axial immobilisas -l 25 Where it is distributed in the n rmal m f th movement transformer grooves 2 7 of the spindle, by small-circle grooves 28 and rrouna 5 is an axial section of a third form of emso h it n circulate throughout the grooves and bodiment of the device showing a mounting of the escape through the small circle of the swivel-joint race 21. tended torus and the axial retaining abutment of the 111 FIG. 4, the Shaft 39 is mounted in n internal bearmovement transformer, ing and an output bearing comprising a double abutment FIGURE 6 is a section along, either the line V1 V1 of placed inside the central sphere 3. The shaft 36 is termi- FIG. 4, or the line VIVI of FIG. 5. nated by an oblique spindle 31 of appreciably truncated In FIGURE 1, the bottom of the casing 1 carries a shape and whose large base is integral with the crank-pin spindle 2 on to which is fixed a hollow sphere, or swivel- 0f the Shaft Whereas the Small base has flutings Totajoint 3, forming the central element around which the tively immobilising, in relation to the shaft 30, the other movement occurs. A hearing 4 is mounted at the end of P 32 0f the Crankshaft fbfmed y the Oblique P the spindle 2 and a race 5 placed at the opposite end of inside of which the spindle lock 31 is adjusted. In the the bearing 4 in the spindle 2 carries a double abutment example Shown, the element 32 which is removable, termibearing 7. The race 5 can be adjusted by means of a Rates y the Spindle 34 carrying flutings enabling the Wedge 6. low connecting shaft 35 to be fixed. 36 denotes a coun- The oblique crank pin 9 on shaft 8 is provided with a terpcise mounted on the element 32 by means of a spin double-faced collar bearing 10. The regulating of the die 37. v race 5 by the wedge 6 allows the axis of the pin 9 to be The frustrurn cone 3% of the movement transformer passed through the center of the hollow male sphere 3 30 is fastened integral with the spherical bearing 39 proforming the central element of the swivel-joint. In gen- 's b! {be sljbbficill retaining g W s 0 7 eral, the oblique pin 9 of the shaft has a length equal to tain a spherical race containing the sphere 3. The exone and a half times it diameter, ternal torus 12 is attached to the assembly 38-39 by the The movement transformer 11 is conoidal and has the intermediate flllstfllm cone fixed y SCIBWSdZ- Th shape of a frustum of a cone. This part comprises a torus 5 mobile toothed crown 43 which is centered in the assem- 12 close to its large base, hollowed and having cavities b y 12-41 rests against the spherical bearing race 39, and 13 for housing connecting-rod heads, described hereafter. is fixed on the components 1241 by radial spindles 44. The small base of movement transformer 11 carries a The fixed crown 45 is held against the frustrum cone 46 bearing 14 made in two parts. The diameter of the houswhich is integral with the base of the end spindle. ing of this hearing is such that the shaft can pass through 79 This device operates in exactly the same manner as it. The movement transformer 11 contains a spherical bearing race 15 which is suitably centered, held and fixed the hollow sphere 3.

A toothed crown, or ring 17, integrally fastened to the that shown in FIG. 1.

11 FIG. 5, the external torus 12 assembly and itsconnectingfrustrum cone 41 is fixed on the elements 38-39 forming the central part of the movement transformer, by the nut 47 screwed on to the part 39 bearing the rear retaining collar. In this embodiment, the spherical race 39. does. not comprise a spherical'retaining ring. The movement transformer is axially retained by the abutment 48 integral with the bearing 14 and pressing on the interior. of the faced sideof the crank-pin 49.

The mobile toothed crown 43 and spindle 45 are mounted as in the example shown in FIG. 4. a

In FIGS. 4 and 5, the fixed central sphere 3 has a groove 50 communicating by holes 51 withthe interior of the swivel-joint. The spherical bearing race 39 has a secant groove 52 of the fixed groove 50, so that by the holes, this groove 50 communicates with the container 53 from which start the lubricating ducts for the connecting-rods.

In .FIG. 6, which is a partial diametral section of the external torus 12, we clearly see how the cavities 13 are fixed in this torus.

The working of the assembly shown in FIG. is identical to that. described in FIG. '1.

The mechanism described above is most particularly applicable to thermic motors, compressors, pumps and similar objects.

Various modifications canmoreover be applied to the forms of embodiment, given by way of examples, without going outside of the scope of the invention.

I claim:

1. A Wobbler mechanism for a barrel engine, comprising a support casing having an opening, a hollow, partly cylindrical spindle integral with said support casing and forming said opening, a hollow spherical member mounted on said spindle, a movement transformer formed of three coaxial parts and mounted for swiveling movement on said spherical member, said parts including a conoidal member having anexternal hollow torus at its outer end provided with a series of cavities for cooperation with connecting rod heads, a spherical bearing race for engagement withsaid spherical member and a first toothed ring both within said conoidal member, fastening means separably securing said spherical bearing race and first toothed ring to said conoidal member, said conoidal member of the movement transformer being axially immobilized by a retaining spherical race mounted on said sphericured to the conoidal member by said fastening means, a crankshaft having an outer cylindrical end portion journaled in said spindle and including an oblique crankpin located inwardly of said spindle, a cylindrical bearing piv- Otally secured to the inner end of said conoidal part and journaling said crankpin, and a secondtoothed ring meshing with said first toothed ring, saidsecond toothed ring being integral with one-edge of a truncated cone whose base opposite to said one edge is secured to a portion of said spindle.

2. A mechanism according to clairn 1, wherein said crankshaft comprises a keyed inner end portion coaxially aligned with said outer end portionfor separable engagement with an internal rotatable shaft, an angled portion outwardly of said inner portion disposed at the same angle to the crankshaft as the axis of said obliquecrankpinand means separably clamping said angledportion and crankpin together in amanner which allows dismounting of the crankpin and outer end portion of the crankshaft in an outward direction along said crankpin axis.

3. Mechanism-according to claim 1, characterized in that each of said cavities in said hollow torus is cylindrical and seats a spherical bearing for a connecting rod head, each said, spherical bearing being formedof two parts assembled together by a ring in two parts provided with internal collars, each female assembly'thus formed being centered in its cavity and retained by an ofi-centered stem fastened to the torus through an opening in its wall c-if center with respect to the axis Ofth6 cylindrical cavity.

References Cited bythe Examiner UNITED STATES PATENTS 1,772,631 8/30 Mead -598 1,908,071 5/33 Snyder 74598 2,332,105 10/43 -Neuland 123'--41.44 2,845,290 7/58 Latzen 287- 2,912,267 11/59 Latzen 287-90 2,968,961 1/ 61 McGregor 7460 3,014,767 12/61 Thrasher et al SOB-72 3,016,273 1/62 Benoit 30872 FOREIGN PATENTS 1,087,864 10/43 Germany.

BROUGHTON GVDURHAM, Primary Examiner. 

1. A WOBBLER MECHANISM FOR A BARREL ENGINE, COMPRISING A SUPPORT CASING HAVING AN OPENING, A HOLLOW, PARTLY CYLINDRICAL SPINDLE INTEGRAL WITH SAID SUPPORT CASING AND FORMING SAID OPENING, A HOLLOW SPHERICAL MEMBER MOUNTED ON SAID SPINDLE, A MOVEMENT TRANSFORMER FORMED OF THREE COAXIAL PARTS AND MOUNTED FOR SWIVELING MOVEMENT ON SAID SPHERICAL MEMBER, SAID PARTS INCLUDING A CONOIDAL MEMBER HAVING AN EXTERNAL HOLLOW TORUS AT ITS OUTER END PROVIDED WITH A SERIES OF CAVITIES FOR COOPERATION WITH CONNECTING ROD HEADS, A SPHERICAL BEARING RACE FOR ENGAGEMENT WITH SAID SPHERICAL MEMBER AND A FIRST TOOTHED RING BOTH WITHIN SAID CONOIDAL MEMBER, FASTENING MEANS SEPARABLY SECRING SAID SPHERICAL BEARING RACE AND FIRST TOOTHED RING TO SAID CONOIDAL MEMBER, SAID CONOIDAL MEMBER OF THE MOVEMENT TRANSFORMER BEING AXIALLY IMMOBILIZED BY A RETAINING SPHERICAL RACE MOUNTED ON SAID SPHERICAL MEMBER OUTWARDLY OF SAID FIRST SPHERICAL RACE AND SECURED TO THE CONOIDAL MEMBER BY SAID FASTENING MEANS, A CRANKSHAFT HAVING AN OUTER CYLINDRICAL END PORTION JOURNALED IN SAID SPINDLE AND INCLUDING AN OBLIQUE CRANKPIN LOCATED INWARDLY OF SAID SPINDLE, A CYLINDRICAL BEARING PIVOTALLY SECURED TO THE INNER END OF SAID CONOIDAL PART AND JOURNALING SAID CRANKPIN, AND A SECOND TOOTHED RING MESHING WITH SAID FIRST TOOTHED RING, SAID SECOND TOOTHED RING BEING INTEGRAL WITH ONE EDGE OF A TRUNCATED CONE WHOSE BASE OPPOSITE TO SAID ONE EDGE IS SECURED TO A PORTION OF SAID SPINDLE. 